This Sunday on "UPFRONT with Mike Gousha," a pivotal presidential primary.

Ted Cruz is surging in Wisconsin, while Bernie Sanders and Hillary Clinton are running neck and neck. "UPFRONT" will have insight and analysis from Christian Schneider of the Milwaukee Journal Sentinel, and John Nichols of the Capital Times.

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Plus, is the RNC's famous pledge now dead? Republican National Committee Chairman Reince Priebus on the Republican candidates backing away from the promise to support the eventual nominee.